crypto/err/err.c

   1 /*
   2  * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include <stdarg.h>
  12 #include <string.h>
  13 #include <internal/cryptlib_int.h>
  14 #include <internal/err.h>
  15 #include <internal/err_int.h>
  16 #include <openssl/lhash.h>
  17 #include <openssl/err.h>
  18 #include <openssl/crypto.h>
  19 #include <openssl/buffer.h>
  20 #include <openssl/bio.h>
  21 #include <openssl/opensslconf.h>
  22 #include <internal/thread_once.h>
  23
  24 static int err_load_strings(const ERR_STRING_DATA *str);
  25
  26 static void ERR_STATE_free(ERR_STATE *s);
  27 #ifndef OPENSSL_NO_ERR
  28 static ERR_STRING_DATA ERR_str_libraries[] = {
  29     {ERR_PACK(ERR_LIB_NONE, 0, 0), "unknown library"},
  30     {ERR_PACK(ERR_LIB_SYS, 0, 0), "system library"},
  31     {ERR_PACK(ERR_LIB_BN, 0, 0), "bignum routines"},
  32     {ERR_PACK(ERR_LIB_RSA, 0, 0), "rsa routines"},
  33     {ERR_PACK(ERR_LIB_DH, 0, 0), "Diffie-Hellman routines"},
  34     {ERR_PACK(ERR_LIB_EVP, 0, 0), "digital envelope routines"},
  35     {ERR_PACK(ERR_LIB_BUF, 0, 0), "memory buffer routines"},
  36     {ERR_PACK(ERR_LIB_OBJ, 0, 0), "object identifier routines"},
  37     {ERR_PACK(ERR_LIB_PEM, 0, 0), "PEM routines"},
  38     {ERR_PACK(ERR_LIB_DSA, 0, 0), "dsa routines"},
  39     {ERR_PACK(ERR_LIB_X509, 0, 0), "x509 certificate routines"},
  40     {ERR_PACK(ERR_LIB_ASN1, 0, 0), "asn1 encoding routines"},
  41     {ERR_PACK(ERR_LIB_CONF, 0, 0), "configuration file routines"},
  42     {ERR_PACK(ERR_LIB_CRYPTO, 0, 0), "common libcrypto routines"},
  43     {ERR_PACK(ERR_LIB_EC, 0, 0), "elliptic curve routines"},
  44     {ERR_PACK(ERR_LIB_ECDSA, 0, 0), "ECDSA routines"},
  45     {ERR_PACK(ERR_LIB_ECDH, 0, 0), "ECDH routines"},
  46     {ERR_PACK(ERR_LIB_SSL, 0, 0), "SSL routines"},
  47     {ERR_PACK(ERR_LIB_BIO, 0, 0), "BIO routines"},
  48     {ERR_PACK(ERR_LIB_PKCS7, 0, 0), "PKCS7 routines"},
  49     {ERR_PACK(ERR_LIB_X509V3, 0, 0), "X509 V3 routines"},
  50     {ERR_PACK(ERR_LIB_PKCS12, 0, 0), "PKCS12 routines"},
  51     {ERR_PACK(ERR_LIB_RAND, 0, 0), "random number generator"},
  52     {ERR_PACK(ERR_LIB_DSO, 0, 0), "DSO support routines"},
  53     {ERR_PACK(ERR_LIB_TS, 0, 0), "time stamp routines"},
  54     {ERR_PACK(ERR_LIB_ENGINE, 0, 0), "engine routines"},
  55     {ERR_PACK(ERR_LIB_OCSP, 0, 0), "OCSP routines"},
  56     {ERR_PACK(ERR_LIB_UI, 0, 0), "UI routines"},
  57     {ERR_PACK(ERR_LIB_FIPS, 0, 0), "FIPS routines"},
  58     {ERR_PACK(ERR_LIB_CMS, 0, 0), "CMS routines"},
  59     {ERR_PACK(ERR_LIB_HMAC, 0, 0), "HMAC routines"},
  60     {ERR_PACK(ERR_LIB_CT, 0, 0), "CT routines"},
  61     {ERR_PACK(ERR_LIB_ASYNC, 0, 0), "ASYNC routines"},
  62     {ERR_PACK(ERR_LIB_KDF, 0, 0), "KDF routines"},
  63     {ERR_PACK(ERR_LIB_OSSL_STORE, 0, 0), "STORE routines"},
  64     {0, NULL},
  65 };
  66
  67 static ERR_STRING_DATA ERR_str_functs[] = {
  68     {ERR_PACK(0, SYS_F_FOPEN, 0), "fopen"},
  69     {ERR_PACK(0, SYS_F_CONNECT, 0), "connect"},
  70     {ERR_PACK(0, SYS_F_GETSERVBYNAME, 0), "getservbyname"},
  71     {ERR_PACK(0, SYS_F_SOCKET, 0), "socket"},
  72     {ERR_PACK(0, SYS_F_IOCTLSOCKET, 0), "ioctlsocket"},
  73     {ERR_PACK(0, SYS_F_BIND, 0), "bind"},
  74     {ERR_PACK(0, SYS_F_LISTEN, 0), "listen"},
  75     {ERR_PACK(0, SYS_F_ACCEPT, 0), "accept"},
  76 # ifdef OPENSSL_SYS_WINDOWS
  77     {ERR_PACK(0, SYS_F_WSASTARTUP, 0), "WSAstartup"},
  78 # endif
  79     {ERR_PACK(0, SYS_F_OPENDIR, 0), "opendir"},
  80     {ERR_PACK(0, SYS_F_FREAD, 0), "fread"},
  81     {ERR_PACK(0, SYS_F_GETADDRINFO, 0), "getaddrinfo"},
  82     {ERR_PACK(0, SYS_F_GETNAMEINFO, 0), "getnameinfo"},
  83     {ERR_PACK(0, SYS_F_SETSOCKOPT, 0), "setsockopt"},
  84     {ERR_PACK(0, SYS_F_GETSOCKOPT, 0), "getsockopt"},
  85     {ERR_PACK(0, SYS_F_GETSOCKNAME, 0), "getsockname"},
  86     {ERR_PACK(0, SYS_F_GETHOSTBYNAME, 0), "gethostbyname"},
  87     {ERR_PACK(0, SYS_F_FFLUSH, 0), "fflush"},
  88     {ERR_PACK(0, SYS_F_OPEN, 0), "open"},
  89     {ERR_PACK(0, SYS_F_CLOSE, 0), "close"},
  90     {ERR_PACK(0, SYS_F_IOCTL, 0), "ioctl"},
  91     {ERR_PACK(0, SYS_F_STAT, 0), "stat"},
  92     {0, NULL},
  93 };
  94
  95 static ERR_STRING_DATA ERR_str_reasons[] = {
  96     {ERR_R_SYS_LIB, "system lib"},
  97     {ERR_R_BN_LIB, "BN lib"},
  98     {ERR_R_RSA_LIB, "RSA lib"},
  99     {ERR_R_DH_LIB, "DH lib"},
 100     {ERR_R_EVP_LIB, "EVP lib"},
 101     {ERR_R_BUF_LIB, "BUF lib"},
 102     {ERR_R_OBJ_LIB, "OBJ lib"},
 103     {ERR_R_PEM_LIB, "PEM lib"},
 104     {ERR_R_DSA_LIB, "DSA lib"},
 105     {ERR_R_X509_LIB, "X509 lib"},
 106     {ERR_R_ASN1_LIB, "ASN1 lib"},
 107     {ERR_R_EC_LIB, "EC lib"},
 108     {ERR_R_BIO_LIB, "BIO lib"},
 109     {ERR_R_PKCS7_LIB, "PKCS7 lib"},
 110     {ERR_R_X509V3_LIB, "X509V3 lib"},
 111     {ERR_R_ENGINE_LIB, "ENGINE lib"},
 112     {ERR_R_UI_LIB, "UI lib"},
 113     {ERR_R_OSSL_STORE_LIB, "STORE lib"},
 114     {ERR_R_ECDSA_LIB, "ECDSA lib"},
 115
 116     {ERR_R_NESTED_ASN1_ERROR, "nested asn1 error"},
 117     {ERR_R_MISSING_ASN1_EOS, "missing asn1 eos"},
 118
 119     {ERR_R_FATAL, "fatal"},
 120     {ERR_R_MALLOC_FAILURE, "malloc failure"},
 121     {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED,
 122      "called a function you should not call"},
 123     {ERR_R_PASSED_NULL_PARAMETER, "passed a null parameter"},
 124     {ERR_R_INTERNAL_ERROR, "internal error"},
 125     {ERR_R_DISABLED, "called a function that was disabled at compile-time"},
 126     {ERR_R_INIT_FAIL, "init fail"},
 127     {ERR_R_OPERATION_FAIL, "operation fail"},
 128
 129     {0, NULL},
 130 };
 131 #endif
 132
 133 static CRYPTO_ONCE err_init = CRYPTO_ONCE_STATIC_INIT;
 134 static int set_err_thread_local;
 135 static CRYPTO_THREAD_LOCAL err_thread_local;
 136
 137 static CRYPTO_ONCE err_string_init = CRYPTO_ONCE_STATIC_INIT;
 138 static CRYPTO_RWLOCK *err_string_lock;
 139
 140 static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *);
 141
 142 /*
 143  * The internal state
 144  */
 145
 146 static LHASH_OF(ERR_STRING_DATA) *int_error_hash = NULL;
 147 static int int_err_library_number = ERR_LIB_USER;
 148
 149 static unsigned long get_error_values(int inc, int top, const char **file,
 150                                       int *line, const char **data,
 151                                       int *flags);
 152
 153 static unsigned long err_string_data_hash(const ERR_STRING_DATA *a)
 154 {
 155     unsigned long ret, l;
 156
 157     l = a->error;
 158     ret = l ^ ERR_GET_LIB(l) ^ ERR_GET_FUNC(l);
 159     return (ret ^ ret % 19 * 13);
 160 }
 161
 162 static int err_string_data_cmp(const ERR_STRING_DATA *a,
 163                                const ERR_STRING_DATA *b)
 164 {
 165     return (int)(a->error - b->error);
 166 }
 167
 168 static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *d)
 169 {
 170     ERR_STRING_DATA *p = NULL;
 171
 172     CRYPTO_THREAD_read_lock(err_string_lock);
 173     p = lh_ERR_STRING_DATA_retrieve(int_error_hash, d);
 174     CRYPTO_THREAD_unlock(err_string_lock);
 175
 176     return p;
 177 }
 178
 179 #ifndef OPENSSL_NO_ERR
 180 # define NUM_SYS_STR_REASONS 127
 181 # define LEN_SYS_STR_REASON 32
 182
 183 static ERR_STRING_DATA SYS_str_reasons[NUM_SYS_STR_REASONS + 1];
 184 /*
 185  * SYS_str_reasons is filled with copies of strerror() results at
 186  * initialization. 'errno' values up to 127 should cover all usual errors,
 187  * others will be displayed numerically by ERR_error_string. It is crucial
 188  * that we have something for each reason code that occurs in
 189  * ERR_str_reasons, or bogus reason strings will be returned for SYSerr(),
 190  * which always gets an errno value and never one of those 'standard' reason
 191  * codes.
 192  */
 193
 194 static void build_SYS_str_reasons(void)
 195 {
 196     /* OPENSSL_malloc cannot be used here, use static storage instead */
 197     static char strerror_tab[NUM_SYS_STR_REASONS][LEN_SYS_STR_REASON];
 198     static int init = 1;
 199     int i;
 200
 201     CRYPTO_THREAD_write_lock(err_string_lock);
 202     if (!init) {
 203         CRYPTO_THREAD_unlock(err_string_lock);
 204         return;
 205     }
 206
 207     for (i = 1; i <= NUM_SYS_STR_REASONS; i++) {
 208         ERR_STRING_DATA *str = &SYS_str_reasons[i - 1];
 209
 210         str->error = ERR_PACK(ERR_LIB_SYS, 0, i);
 211         if (str->string == NULL) {
 212             char (*dest)[LEN_SYS_STR_REASON] = &(strerror_tab[i - 1]);
 213             if (openssl_strerror_r(i, *dest, sizeof(*dest)))
 214                 str->string = *dest;
 215         }
 216         if (str->string == NULL)
 217             str->string = "unknown";
 218     }
 219
 220     /*
 221      * Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL}, as
 222      * required by ERR_load_strings.
 223      */
 224
 225     init = 0;
 226
 227     CRYPTO_THREAD_unlock(err_string_lock);
 228     err_load_strings(SYS_str_reasons);
 229 }
 230 #endif
 231
 232 #define err_clear_data(p,i) \
 233         do { \
 234         if ((p)->err_data_flags[i] & ERR_TXT_MALLOCED) \
 235                 {  \
 236                 OPENSSL_free((p)->err_data[i]); \
 237                 (p)->err_data[i]=NULL; \
 238                 } \
 239         (p)->err_data_flags[i]=0; \
 240         } while(0)
 241
 242 #define err_clear(p,i) \
 243         do { \
 244         (p)->err_flags[i]=0; \
 245         (p)->err_buffer[i]=0; \
 246         err_clear_data(p,i); \
 247         (p)->err_file[i]=NULL; \
 248         (p)->err_line[i]= -1; \
 249         } while(0)
 250
 251 static void ERR_STATE_free(ERR_STATE *s)
 252 {
 253     int i;
 254
 255     if (s == NULL)
 256         return;
 257
 258     for (i = 0; i < ERR_NUM_ERRORS; i++) {
 259         err_clear_data(s, i);
 260     }
 261     OPENSSL_free(s);
 262 }
 263
 264 DEFINE_RUN_ONCE_STATIC(do_err_strings_init)
 265 {
 266     OPENSSL_init_crypto(0, NULL);
 267     err_string_lock = CRYPTO_THREAD_lock_new();
 268     int_error_hash = lh_ERR_STRING_DATA_new(err_string_data_hash,
 269                                             err_string_data_cmp);
 270     return err_string_lock != NULL && int_error_hash != NULL;
 271 }
 272
 273 void err_cleanup(void)
 274 {
 275     if (set_err_thread_local != 0)
 276         CRYPTO_THREAD_cleanup_local(&err_thread_local);
 277     CRYPTO_THREAD_lock_free(err_string_lock);
 278     err_string_lock = NULL;
 279     lh_ERR_STRING_DATA_free(int_error_hash);
 280     int_error_hash = NULL;
 281 }
 282
 283 /*
 284  * Legacy; pack in the library.
 285  */
 286 static void err_patch(int lib, ERR_STRING_DATA *str)
 287 {
 288     unsigned long plib = ERR_PACK(lib, 0, 0);
 289
 290     for (; str->error != 0; str++)
 291         str->error |= plib;
 292 }
 293
 294 /*
 295  * Hash in |str| error strings. Assumes the URN_ONCE was done.
 296  */
 297 static int err_load_strings(const ERR_STRING_DATA *str)
 298 {
 299     CRYPTO_THREAD_write_lock(err_string_lock);
 300     for (; str->error; str++)
 301         (void)lh_ERR_STRING_DATA_insert(int_error_hash,
 302                                        (ERR_STRING_DATA *)str);
 303     CRYPTO_THREAD_unlock(err_string_lock);
 304     return 1;
 305 }
 306
 307 int ERR_load_ERR_strings(void)
 308 {
 309 #ifndef OPENSSL_NO_ERR
 310     if (!RUN_ONCE(&err_string_init, do_err_strings_init))
 311         return 0;
 312
 313     err_load_strings(ERR_str_libraries);
 314     err_load_strings(ERR_str_reasons);
 315     err_patch(ERR_LIB_SYS, ERR_str_functs);
 316     err_load_strings(ERR_str_functs);
 317     build_SYS_str_reasons();
 318 #endif
 319     return 1;
 320 }
 321
 322 int ERR_load_strings(int lib, ERR_STRING_DATA *str)
 323 {
 324     if (ERR_load_ERR_strings() == 0)
 325         return 0;
 326
 327     err_patch(lib, str);
 328     err_load_strings(str);
 329     return 1;
 330 }
 331
 332 int ERR_load_strings_const(const ERR_STRING_DATA *str)
 333 {
 334     if (ERR_load_ERR_strings() == 0)
 335         return 0;
 336     err_load_strings(str);
 337     return 1;
 338 }
 339
 340 int ERR_unload_strings(int lib, ERR_STRING_DATA *str)
 341 {
 342     if (!RUN_ONCE(&err_string_init, do_err_strings_init))
 343         return 0;
 344
 345     CRYPTO_THREAD_write_lock(err_string_lock);
 346     /*
 347      * We don't need to ERR_PACK the lib, since that was done (to
 348      * the table) when it was loaded.
 349      */
 350     for (; str->error; str++)
 351         (void)lh_ERR_STRING_DATA_delete(int_error_hash, str);
 352     CRYPTO_THREAD_unlock(err_string_lock);
 353
 354     return 1;
 355 }
 356
 357 void err_free_strings_int(void)
 358 {
 359     if (!RUN_ONCE(&err_string_init, do_err_strings_init))
 360         return;
 361 }
 362
 363 /********************************************************/
 364
 365 void ERR_put_error(int lib, int func, int reason, const char *file, int line)
 366 {
 367     ERR_STATE *es;
 368
 369 #ifdef _OSD_POSIX
 370     /*
 371      * In the BS2000-OSD POSIX subsystem, the compiler generates path names
 372      * in the form "*POSIX(/etc/passwd)". This dirty hack strips them to
 373      * something sensible. @@@ We shouldn't modify a const string, though.
 374      */
 375     if (strncmp(file, "*POSIX(", sizeof("*POSIX(") - 1) == 0) {
 376         char *end;
 377
 378         /* Skip the "*POSIX(" prefix */
 379         file += sizeof("*POSIX(") - 1;
 380         end = &file[strlen(file) - 1];
 381         if (*end == ')')
 382             *end = '\0';
 383         /* Optional: use the basename of the path only. */
 384         if ((end = strrchr(file, '/')) != NULL)
 385             file = &end[1];
 386     }
 387 #endif
 388     es = ERR_get_state();
 389     if (es == NULL)
 390         return;
 391
 392     es->top = (es->top + 1) % ERR_NUM_ERRORS;
 393     if (es->top == es->bottom)
 394         es->bottom = (es->bottom + 1) % ERR_NUM_ERRORS;
 395     es->err_flags[es->top] = 0;
 396     es->err_buffer[es->top] = ERR_PACK(lib, func, reason);
 397     es->err_file[es->top] = file;
 398     es->err_line[es->top] = line;
 399     err_clear_data(es, es->top);
 400 }
 401
 402 void ERR_clear_error(void)
 403 {
 404     int i;
 405     ERR_STATE *es;
 406
 407     es = ERR_get_state();
 408     if (es == NULL)
 409         return;
 410
 411     for (i = 0; i < ERR_NUM_ERRORS; i++) {
 412         err_clear(es, i);
 413     }
 414     es->top = es->bottom = 0;
 415 }
 416
 417 unsigned long ERR_get_error(void)
 418 {
 419     return (get_error_values(1, 0, NULL, NULL, NULL, NULL));
 420 }
 421
 422 unsigned long ERR_get_error_line(const char **file, int *line)
 423 {
 424     return (get_error_values(1, 0, file, line, NULL, NULL));
 425 }
 426
 427 unsigned long ERR_get_error_line_data(const char **file, int *line,
 428                                       const char **data, int *flags)
 429 {
 430     return (get_error_values(1, 0, file, line, data, flags));
 431 }
 432
 433 unsigned long ERR_peek_error(void)
 434 {
 435     return (get_error_values(0, 0, NULL, NULL, NULL, NULL));
 436 }
 437
 438 unsigned long ERR_peek_error_line(const char **file, int *line)
 439 {
 440     return (get_error_values(0, 0, file, line, NULL, NULL));
 441 }
 442
 443 unsigned long ERR_peek_error_line_data(const char **file, int *line,
 444                                        const char **data, int *flags)
 445 {
 446     return (get_error_values(0, 0, file, line, data, flags));
 447 }
 448
 449 unsigned long ERR_peek_last_error(void)
 450 {
 451     return (get_error_values(0, 1, NULL, NULL, NULL, NULL));
 452 }
 453
 454 unsigned long ERR_peek_last_error_line(const char **file, int *line)
 455 {
 456     return (get_error_values(0, 1, file, line, NULL, NULL));
 457 }
 458
 459 unsigned long ERR_peek_last_error_line_data(const char **file, int *line,
 460                                             const char **data, int *flags)
 461 {
 462     return (get_error_values(0, 1, file, line, data, flags));
 463 }
 464
 465 static unsigned long get_error_values(int inc, int top, const char **file,
 466                                       int *line, const char **data,
 467                                       int *flags)
 468 {
 469     int i = 0;
 470     ERR_STATE *es;
 471     unsigned long ret;
 472
 473     es = ERR_get_state();
 474     if (es == NULL)
 475         return 0;
 476
 477     if (inc && top) {
 478         if (file)
 479             *file = "";
 480         if (line)
 481             *line = 0;
 482         if (data)
 483             *data = "";
 484         if (flags)
 485             *flags = 0;
 486
 487         return ERR_R_INTERNAL_ERROR;
 488     }
 489
 490     if (es->bottom == es->top)
 491         return 0;
 492     if (top)
 493         i = es->top;            /* last error */
 494     else
 495         i = (es->bottom + 1) % ERR_NUM_ERRORS; /* first error */
 496
 497     ret = es->err_buffer[i];
 498     if (inc) {
 499         es->bottom = i;
 500         es->err_buffer[i] = 0;
 501     }
 502
 503     if ((file != NULL) && (line != NULL)) {
 504         if (es->err_file[i] == NULL) {
 505             *file = "NA";
 506             if (line != NULL)
 507                 *line = 0;
 508         } else {
 509             *file = es->err_file[i];
 510             if (line != NULL)
 511                 *line = es->err_line[i];
 512         }
 513     }
 514
 515     if (data == NULL) {
 516         if (inc) {
 517             err_clear_data(es, i);
 518         }
 519     } else {
 520         if (es->err_data[i] == NULL) {
 521             *data = "";
 522             if (flags != NULL)
 523                 *flags = 0;
 524         } else {
 525             *data = es->err_data[i];
 526             if (flags != NULL)
 527                 *flags = es->err_data_flags[i];
 528         }
 529     }
 530     return ret;
 531 }
 532
 533 void ERR_error_string_n(unsigned long e, char *buf, size_t len)
 534 {
 535     char lsbuf[64], fsbuf[64], rsbuf[64];
 536     const char *ls, *fs, *rs;
 537     unsigned long l, f, r;
 538
 539     if (len == 0)
 540         return;
 541
 542     l = ERR_GET_LIB(e);
 543     f = ERR_GET_FUNC(e);
 544     r = ERR_GET_REASON(e);
 545
 546     ls = ERR_lib_error_string(e);
 547     fs = ERR_func_error_string(e);
 548     rs = ERR_reason_error_string(e);
 549
 550     if (ls == NULL)
 551         BIO_snprintf(lsbuf, sizeof(lsbuf), "lib(%lu)", l);
 552     if (fs == NULL)
 553         BIO_snprintf(fsbuf, sizeof(fsbuf), "func(%lu)", f);
 554     if (rs == NULL)
 555         BIO_snprintf(rsbuf, sizeof(rsbuf), "reason(%lu)", r);
 556
 557     BIO_snprintf(buf, len, "error:%08lX:%s:%s:%s", e, ls ? ls : lsbuf,
 558                  fs ? fs : fsbuf, rs ? rs : rsbuf);
 559     if (strlen(buf) == len - 1) {
 560         /*
 561          * output may be truncated; make sure we always have 5
 562          * colon-separated fields, i.e. 4 colons ...
 563          */
 564 #define NUM_COLONS 4
 565         if (len > NUM_COLONS) { /* ... if possible */
 566             int i;
 567             char *s = buf;
 568
 569             for (i = 0; i < NUM_COLONS; i++) {
 570                 char *colon = strchr(s, ':');
 571                 if (colon == NULL || colon > &buf[len - 1] - NUM_COLONS + i) {
 572                     /*
 573                      * set colon no. i at last possible position (buf[len-1]
 574                      * is the terminating 0)
 575                      */
 576                     colon = &buf[len - 1] - NUM_COLONS + i;
 577                     *colon = ':';
 578                 }
 579                 s = colon + 1;
 580             }
 581         }
 582     }
 583 }
 584
 585 /*
 586  * ERR_error_string_n should be used instead for ret != NULL as
 587  * ERR_error_string cannot know how large the buffer is
 588  */
 589 char *ERR_error_string(unsigned long e, char *ret)
 590 {
 591     static char buf[256];
 592
 593     if (ret == NULL)
 594         ret = buf;
 595     ERR_error_string_n(e, ret, 256);
 596
 597     return ret;
 598 }
 599
 600 const char *ERR_lib_error_string(unsigned long e)
 601 {
 602     ERR_STRING_DATA d, *p;
 603     unsigned long l;
 604
 605     if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
 606         return NULL;
 607     }
 608
 609     l = ERR_GET_LIB(e);
 610     d.error = ERR_PACK(l, 0, 0);
 611     p = int_err_get_item(&d);
 612     return ((p == NULL) ? NULL : p->string);
 613 }
 614
 615 const char *ERR_func_error_string(unsigned long e)
 616 {
 617     ERR_STRING_DATA d, *p;
 618     unsigned long l, f;
 619
 620     if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
 621         return NULL;
 622     }
 623
 624     l = ERR_GET_LIB(e);
 625     f = ERR_GET_FUNC(e);
 626     d.error = ERR_PACK(l, f, 0);
 627     p = int_err_get_item(&d);
 628     return ((p == NULL) ? NULL : p->string);
 629 }
 630
 631 const char *ERR_reason_error_string(unsigned long e)
 632 {
 633     ERR_STRING_DATA d, *p = NULL;
 634     unsigned long l, r;
 635
 636     if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
 637         return NULL;
 638     }
 639
 640     l = ERR_GET_LIB(e);
 641     r = ERR_GET_REASON(e);
 642     d.error = ERR_PACK(l, 0, r);
 643     p = int_err_get_item(&d);
 644     if (!p) {
 645         d.error = ERR_PACK(0, 0, r);
 646         p = int_err_get_item(&d);
 647     }
 648     return ((p == NULL) ? NULL : p->string);
 649 }
 650
 651 void err_delete_thread_state(void)
 652 {
 653     ERR_STATE *state = CRYPTO_THREAD_get_local(&err_thread_local);
 654     if (state == NULL)
 655         return;
 656
 657     CRYPTO_THREAD_set_local(&err_thread_local, NULL);
 658     ERR_STATE_free(state);
 659 }
 660
 661 #if OPENSSL_API_COMPAT < 0x10100000L
 662 void ERR_remove_thread_state(void *dummy)
 663 {
 664 }
 665 #endif
 666
 667 #if OPENSSL_API_COMPAT < 0x10000000L
 668 void ERR_remove_state(unsigned long pid)
 669 {
 670 }
 671 #endif
 672
 673 DEFINE_RUN_ONCE_STATIC(err_do_init)
 674 {
 675     set_err_thread_local = 1;
 676     return CRYPTO_THREAD_init_local(&err_thread_local, NULL);
 677 }
 678
 679 ERR_STATE *ERR_get_state(void)
 680 {
 681     ERR_STATE *state = NULL;
 682
 683     if (!RUN_ONCE(&err_init, err_do_init))
 684         return NULL;
 685
 686     state = CRYPTO_THREAD_get_local(&err_thread_local);
 687
 688     if (state == NULL) {
 689         state = OPENSSL_zalloc(sizeof(*state));
 690         if (state == NULL)
 691             return NULL;
 692
 693         if (!ossl_init_thread_start(OPENSSL_INIT_THREAD_ERR_STATE)
 694             || !CRYPTO_THREAD_set_local(&err_thread_local, state)) {
 695             ERR_STATE_free(state);
 696             return NULL;
 697         }
 698
 699         /* Ignore failures from these */
 700         OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
 701     }
 702
 703     return state;
 704 }
 705
 706 int ERR_get_next_error_library(void)
 707 {
 708     int ret;
 709
 710     if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
 711         return 0;
 712     }
 713
 714     CRYPTO_THREAD_write_lock(err_string_lock);
 715     ret = int_err_library_number++;
 716     CRYPTO_THREAD_unlock(err_string_lock);
 717     return ret;
 718 }
 719
 720 void ERR_set_error_data(char *data, int flags)
 721 {
 722     ERR_STATE *es;
 723     int i;
 724
 725     es = ERR_get_state();
 726     if (es == NULL)
 727         return;
 728
 729     i = es->top;
 730     if (i == 0)
 731         i = ERR_NUM_ERRORS - 1;
 732
 733     err_clear_data(es, i);
 734     es->err_data[i] = data;
 735     es->err_data_flags[i] = flags;
 736 }
 737
 738 void ERR_add_error_data(int num, ...)
 739 {
 740     va_list args;
 741     va_start(args, num);
 742     ERR_add_error_vdata(num, args);
 743     va_end(args);
 744 }
 745
 746 void ERR_add_error_vdata(int num, va_list args)
 747 {
 748     int i, n, s;
 749     char *str, *p, *a;
 750
 751     s = 80;
 752     str = OPENSSL_malloc(s + 1);
 753     if (str == NULL)
 754         return;
 755     str[0] = '\0';
 756
 757     n = 0;
 758     for (i = 0; i < num; i++) {
 759         a = va_arg(args, char *);
 760         if (a == NULL)
 761             a = "<NULL>";
 762         n += strlen(a);
 763         if (n > s) {
 764             s = n + 20;
 765             p = OPENSSL_realloc(str, s + 1);
 766             if (p == NULL) {
 767                 OPENSSL_free(str);
 768                 return;
 769             }
 770             str = p;
 771         }
 772         OPENSSL_strlcat(str, a, (size_t)s + 1);
 773     }
 774     ERR_set_error_data(str, ERR_TXT_MALLOCED | ERR_TXT_STRING);
 775 }
 776
 777 int ERR_set_mark(void)
 778 {
 779     ERR_STATE *es;
 780
 781     es = ERR_get_state();
 782     if (es == NULL)
 783         return 0;
 784
 785     if (es->bottom == es->top)
 786         return 0;
 787     es->err_flags[es->top] |= ERR_FLAG_MARK;
 788     return 1;
 789 }
 790
 791 int ERR_pop_to_mark(void)
 792 {
 793     ERR_STATE *es;
 794
 795     es = ERR_get_state();
 796     if (es == NULL)
 797         return 0;
 798
 799     while (es->bottom != es->top
 800            && (es->err_flags[es->top] & ERR_FLAG_MARK) == 0) {
 801         err_clear(es, es->top);
 802         es->top -= 1;
 803         if (es->top == -1)
 804             es->top = ERR_NUM_ERRORS - 1;
 805     }
 806
 807     if (es->bottom == es->top)
 808         return 0;
 809     es->err_flags[es->top] &= ~ERR_FLAG_MARK;
 810     return 1;
 811 }